Also, now that I am reading focusing on your words and not trying to figure out what you mean, a lexicon is a collection of words, not a collection of character

Also, now that I am reading focusing on your words and not trying to figure out what you mean, a lexicon is a collection of words, not a collection of characters. The concepts overlap somewhat in the case of Chinese, but katakana, for instance, is certainly not a lexicon. (apologies for replying again, but the time for editing has passed)